DC brushless motor for autonomous vehicles

Oriental Motor has introduced the BLV-R Series of low voltage input power DC motors. Based on the existing BLV series, the BLV-R motorsare specifically designed to make them a cost-effective solution for AGVs and AMRs.

The BLV-R series has been designed with enhanced speed capabilities and a proprietary communication system. Additionally, they are in a compact form factor that is ideally suited for use in the limited internal space, typically available in AGVs.

The low voltage input power DC motor drivers measure 75mm x 65mm x 29mm, and weigh 120g, which, Oriental Motor claims, makes the BLV-R series the smallest comprehensive BLDC drivers in the industry today. The motors themselves are also compact. For example, a 100W motor with a 30:1 gearbox measures 108.4mm in length and weighs 2.4kg.

 
The usable voltage range has been extended and is now 15VDC to 55VDC, with a speed control range of 1:4000rpm. This wide input range is particularly beneficial for AGV operation, handling voltage changes which AGVs can find difficult to manage. For example, it compensates for voltage drops within the battery of an AGV, allowing it to continue operation. It also ensures that, in other circumstances, the AGV maintains normal operation if back regenerative energy causes the battery voltage to increase temporarily. 

Improved higher resolution, positional Hall sensors within the motors enhance motor feedback, improve stopping accuracy and lower speed operation. Improved torque control within the drivers results in stable speeds which can be easily maintained. The BLV-R Series also has accurate torque control all the way down to 1rpm. Typically, these levels of performance are very difficult for brushless DC motors to achieve, but are essential requirements in AGVs because this allows them to make move and make very accurate turns smoothly.

Another new function is ATL mode, which allows the motors to deliver up to 300% of the rated torque continuously unless the driver’s thermal alarm is triggered. This is particularly suitable for AGV motors which are often required to deliver loads up slopes and ramps in the warehouse.

The proprietary ID Share Mode is another enhancement. Developed by Oriental Motor, this allows commands to be sent to multiple motors simultaneously. This ensures AGV movement accuracy and contributes to the smooth operation within confined areas.
 The 24/48 VDC input drivers and all new W (1/8 HP) and 200 W (1/4 HP) brushless DC motors are energy-efficient to extends an AGV battery’s operating lifetime. The compact drivers support Modbus or CANopen communications. In addition, the BLV-R series is approved to UL and CE certifications.

www.oriental-motor.co.uk